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Note 2 - Acquisitions (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 01, 2021
Sep. 01, 2021
Jul. 02, 2021
Jun. 01, 2021
Sep. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total           $ 11,421 $ 465,926  
Goodwill, Ending Balance         $ 1,359,588 1,359,588   $ 1,409,674
Payment for Contingent Consideration Liability, Financing Activities           16,135 $ 3,750  
Acquisition of Deep Sea [Member]                
Payments to Acquire Businesses, Net of Cash Acquired, Total       $ 420,700        
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill         437,874 437,874    
Goodwill, Ending Balance         263,604 263,604   263,604
Acquisition of Chilicon [Member]                
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill         70,174 70,174    
Goodwill, Ending Balance         36,974 36,974    
Business Combination, Consideration Transferred, Total     $ 61,129          
Acquisition of Off Grid Energy [Member]                
Payments to Acquire Businesses, Net of Cash Acquired, Total   $ 56,949            
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill   56,076            
Goodwill, Ending Balance   21,531            
Business Combination, Contingent Consideration, Liability, Total   $ 29,054            
Payment for Contingent Consideration Liability, Financing Activities         16,135      
Other 2021 Acquisitions [Member]                
Payments to Acquire Businesses, Net of Cash Acquired, Total $ 735,632             $ 29,945
Business Acquisition, Purchase Price Allocation, Intangible Assets Including Goodwill         799,228 799,228    
Goodwill, Ending Balance         $ 241,328 $ 241,328